Have you ever experienced when you read a book and it was a good start but when you were in the middle of reading it the story didn't make sense anymore and the story was all over the place. Ugh! I lost count on how many times I've experienced that.
My number one rule before reading stories is that it should be tagged as 'Completed' because we all know that there are books that are no longer being updated by the writer and it just broke my heart especially if it is very good and promising.